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sensors Mode-S transponder

4CA9BB

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-LRB · AIRBUS A-321neo

Hex
4CA9BB
Octal
23124673
Decimal
5,024,187
Country
IE
Tail
EI-LRB
Type
A21N
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
350
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S 4CA9BB.

Country allocation

The ICAO 24-bit address 4CA9BB falls within the block assigned to Ireland (IE) by ICAO Annex 10, Volume III. Every aircraft registered in Ireland receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
EIN1LH - 22 2026-07-06
EIN1EA - 19 2026-07-07
EIN1YL - 16 2026-07-02
EIN1TC Aer Lingus 16 2026-07-25
EIN1AC Aer Lingus 16 2026-07-02
EIN10M Aer Lingus 16 2026-07-25
EIN1PR Aer Lingus 15 2026-07-26
EIN13X Aer Lingus 15 2026-07-26
EIN52X - 14 2026-07-12
EIN52A - 13 2026-07-12
EIN38A - 13 2026-07-01
EIN381 - 12 2026-07-01
EIN1XL Aer Lingus 9 2026-07-23
EIN3KM Aer Lingus 8 2026-07-23
EIN3GM Aer Lingus 8 2026-07-23
EIN1XG Aer Lingus 8 2026-07-24
EIN11T - 8 2026-07-22
EIN11P Aer Lingus 8 2026-07-22
EIN138 - 7 2026-07-09
EIN9AR Aer Lingus 6 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EIN1PR BDL → DUB Jul 26, 22:10 UTCJul 26, 22:45 UTC35m
2026-07-26 EIN13X DUB → BDL Jul 26, 13:55 UTCJul 26, 20:35 UTC6h 40m
2026-07-25 EIN1TC EWR → DUB Jul 25, 21:55 UTCJul 26, 03:45 UTC5h 50m
2026-07-25 EIN10M DUB → EWR Jul 25, 12:45 UTCJul 25, 19:35 UTC6h 50m
2026-07-25 EIN9EG PIT → DUB Jul 25, 00:30 UTCJul 25, 06:35 UTC6h 5m
2026-07-24 EIN9AF DUB → PIT Jul 24, 15:15 UTCJul 24, 22:35 UTC7h 20m
2026-07-24 EIN1XG PHL → DUB Jul 24, 00:45 UTCJul 24, 06:50 UTC6h 5m
2026-07-23 EIN1XL DUB → PHL Jul 23, 21:25 UTCJul 23, 22:30 UTC1h 5m
2026-07-23 EIN1XL DUB → PHL Jul 23, 15:35 UTCJul 23, 21:20 UTC5h 45m
2026-07-23 EIN3GM MUC → DUB Jul 23, 09:45 UTCJul 23, 11:45 UTC2h 0m
2026-07-23 EIN3KM DUB → MUC Jul 23, 06:50 UTCJul 23, 08:45 UTC1h 55m
2026-07-22 EIN11P IAD → DUB Jul 22, 21:35 UTCJul 23, 03:40 UTC6h 5m
2026-07-22 EIN11T DUB → IAD Jul 22, 12:05 UTCJul 22, 19:20 UTC7h 15m
2026-07-22 EIN118 IAD → DUB Jul 22, 03:05 UTCJul 22, 05:10 UTC2h 5m
2026-07-21 EIN119 DUB → IAD Jul 21, 15:55 UTCJul 21, 23:25 UTC7h 30m
2026-07-21 EIN627 OSL → DUB Jul 21, 11:55 UTCJul 21, 13:40 UTC1h 45m
2026-07-21 EIN626 DUB → OSL Jul 21, 08:55 UTCJul 21, 10:50 UTC1h 55m
2026-07-21 EIN1XG PHL → DUB Jul 21, 00:55 UTCJul 21, 07:00 UTC6h 5m
2026-07-20 EIN1XL DUB → PHL Jul 20, 16:10 UTCJul 20, 23:05 UTC6h 55m
2026-07-20 EIN205 MAN → DUB Jul 20, 11:25 UTCJul 20, 11:55 UTC30m
2026-07-20 EIN204 DUB → MAN Jul 20, 09:15 UTCJul 20, 09:55 UTC40m
2026-07-20 EIN9EG - Jul 20, 00:25 UTCJul 20, 07:15 UTC6h 50m
2026-07-19 EIN9AF - Jul 19, 15:05 UTCJul 19, 22:05 UTC7h 0m
2026-07-19 EIN5DR CDG → DUB Jul 19, 09:35 UTCJul 19, 10:55 UTC1h 20m
2026-07-19 EIN522 DUB → CDG Jul 19, 06:40 UTCJul 19, 07:50 UTC1h 10m
2026-07-18 EIN33W BER → DUB Jul 18, 19:40 UTCJul 18, 21:30 UTC1h 50m
2026-07-18 EIN33T - Jul 18, 17:00 UTCJul 18, 18:45 UTC1h 45m
2026-07-17 EIN1PR BDL → DUB Jul 17, 22:05 UTCJul 18, 04:00 UTC5h 56m
2026-07-17 EIN13X - Jul 17, 13:35 UTCJul 17, 19:49 UTC6h 15m
2026-07-17 EIN5DR CDG → DUB Jul 17, 10:05 UTCJul 17, 11:20 UTC1h 15m
2026-07-17 EIN522 DUB → CDG Jul 17, 07:25 UTCJul 17, 08:45 UTC1h 20m
2026-07-16 EIN76H - Jul 16, 19:55 UTCJul 16, 23:20 UTC3h 25m
2026-07-16 EIN76K - Jul 16, 14:40 UTCJul 16, 18:25 UTC3h 45m
2026-07-14 EIN459 BDS → DUB Jul 14, 19:15 UTCJul 14, 22:30 UTC3h 15m
2026-07-14 EIN458 - Jul 14, 15:25 UTCJul 14, 18:15 UTC2h 50m
2026-07-14 EIN525 CDG → DUB Jul 14, 11:25 UTCJul 14, 12:50 UTC1h 25m
2026-07-14 EIN524 DUB → CDG Jul 14, 09:05 UTCJul 14, 10:25 UTC1h 20m
2026-07-14 EIN9EG - Jul 14, 00:15 UTCJul 14, 07:05 UTC6h 50m
2026-07-13 EIN9AF - Jul 13, 15:05 UTCJul 13, 22:05 UTC7h 0m
2026-07-13 EIN605P - Jul 13, 11:50 UTCJul 13, 13:00 UTC1h 10m
2026-07-13 EIN60T DUB → AMS Jul 13, 09:25 UTCJul 13, 10:35 UTC1h 10m
2026-07-13 EIN1XG PHL → DUB Jul 13, 00:55 UTCJul 13, 07:10 UTC6h 15m
2026-07-12 EIN1XL DUB → PHL Jul 12, 15:45 UTCJul 12, 22:35 UTC6h 50m
2026-07-12 EIN52X - Jul 12, 08:25 UTCJul 12, 09:50 UTC1h 25m
2026-07-12 EIN52A DUB → CDG Jul 12, 06:15 UTCJul 12, 07:25 UTC1h 10m
2026-07-11 EIN1PR - Jul 11, 21:55 UTCJul 12, 03:30 UTC5h 35m
2026-07-11 EIN13X DUB → BDL Jul 11, 13:30 UTCJul 11, 20:05 UTC6h 35m
2026-07-11 EIN1XG PHL → DUB Jul 11, 01:35 UTCJul 11, 07:50 UTC6h 15m
2026-07-10 EIN1XL DUB → PHL Jul 10, 15:45 UTCJul 10, 23:05 UTC7h 21m
2026-07-10 EIN525 - Jul 10, 11:40 UTCJul 10, 13:00 UTC1h 20m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the EI-LRB page for operator, model, and routing details .

Mode-S 4CA9BB frequently asked

What is Mode-S code 4CA9BB?
4CA9BB is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-LRB.
Where is Mode-S 4CA9BB registered?
Mode-S code 4CA9BB is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA9BB broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA9BB, octal 23124673, decimal 5,024,187.
What flights does 4CA9BB operate?
Mode-S 4CA9BB has broadcast 20 distinct callsigns, including EIN1LH, EIN1EA, EIN1YL, EIN1TC, EIN1AC.